[libraries/cxx-rust-cssparser] cpp: Fix leaking stylesheet

Git commit a3b605a5633857f3f6a4df1b41c4703408515902 by Nicolas Fella.
Committed on 03/08/2026 at 15:02.
Pushed by nicolasfella into branch 'master'.

Fix leaking stylesheet

We get a Box object from Rust, which is comparable to a unique_ptr.

Currently we release it, and then never free the memory.

Instead hold on to the actual box object until we don't need it any
more, freeing the memory.

M  +8    -6    cpp/CssParser.cpp

https://invent.kde.org/libraries/cxx-rust-cssparser/-/commit/a3b605a5633857f3f6a4df1b41c4703408515902

diff --git a/cpp/CssParser.cpp b/cpp/CssParser.cpp
index c6c066f..1cdfdfe 100644
--- a/cpp/CssParser.cpp
+++ b/cpp/CssParser.cpp
@@ -52,23 +52,25 @@ Rule Rule::fromRust(const rust::StyleRule &rule)
 
 struct StyleSheet::Private
 {
+    Private(std::filesystem::path path)
+        : path(path)
+        , stylesheet(rust::create_stylesheet(path.string()))
+    {
+    }
+
     void update();
 
     std::filesystem::path path;
 
-    rust::StyleSheet *stylesheet;
+    ::rust::Box<rust::StyleSheet> stylesheet;
     std::vector<Rule> rules;
     std::vector<Error> errors;
     std::vector<std::filesystem::path> paths;
 };
 
 StyleSheet::StyleSheet(const std::filesystem::path &path)
-    : d(std::make_unique<Private>())
+    : d(std::make_unique<Private>(path))
 {
-    d->path = path;
-
-    auto sheet = rust::create_stylesheet(path.string());
-    d->stylesheet = sheet.into_raw();
 }
 
 StyleSheet::~StyleSheet() = default;